TC 294: Tentative Carryback Disallowance

What the code actually does

IRS Document 6209 (the IRS’s reference guide to its data-processing codes) defines TC 294 as "Tentative Carryback Disallowance with Interest Computation Date": it is "used to adjust a previously posted tentative allowance (e.g. TC 295 or 305), contains a beginning interest computation date, and can carry TC 290, 291 or penalty code." TC 294 cannot post on its own — a TC 295 or 305 must already sit in the module (the record for one tax type and period), and the TC 294 amount can never exceed what that earlier credit allowed. It is a debit: it puts back some or all of the money a tentative allowance had put out.

The "interest computation date" is the operative detail. A tentative carryback allowance under TC 295 is paid out on the 90-day statutory clock of IRC §6411(b) with no real audit first — the IRS examines the claim afterward. When that later review finds the taxpayer was not entitled to the full amount, TC 294 reverses the excess and starts interest running from the date supplied with the transaction, not from today.

Why this is different from an ordinary tax increase

A routine additional assessment like TC 290 raises the tax liability itself. TC 294 does something narrower: it can only unwind money that TC 295 or TC 305 already advanced, and only up to that amount. IRM 21.5.9.4.7, in the Carrybacks chapter, requires separate adjustments for a carryback (TC 295 or TC 299) and a general tax increase or decrease (TC 290 or TC 291).

Document 6209 requires a TC 295 or 305 in the module before a TC 294 can post, which matters for reading a transcript: a TC 294 with no TC 295 or 305 anywhere in the account history is not a code operating as designed. If the pairing is missing, the assessment should not be taken at face value without asking the IRS to explain where the underlying tentative allowance actually is.

What the interest computation date means for the balance

If TC 294 appears, the IRS previously paid a tentative refund tied to a net operating loss, capital loss, or credit carryback, and has now decided part or all of it was not warranted. Interest on the amount being taken back starts from the interest computation date carried with the transaction, which can be well before the TC 294 posting date itself — so the dollar amount on the transcript understates what is actually owed by the time it is discovered.

This is not a penalty for wrongdoing by itself; a tentative allowance is deliberately paid before a full review, so a later disallowance is a built-in feature of the program, not automatically a sign of an inaccurate return. But it does mean the account balance needs to be checked against the interest computation date, not just the TC 294 amount, before agreeing to any figure the IRS states is owed.

What people mistake TC 294 for

TC 294 is easy to mistake for TC 304, which does the identical job — disallowing a tentative carryback allowance with an interest computation date — but only when Examination made the determination, carries Doc Code 47 (an examination adjustment) instead of 54 (a data processing adjustment), and behaves "same as TC 300" rather than "same as TC 290." A TC 294 on the transcript signals a processing-level correction; a TC 304 signals the disallowance came out of an actual examination.

It is also not the same as TC 299, the general abatement-with-interest-computation-date code: TC 299 is explicitly barred from combining with a TC 294 or 295 adjustment on the same document under Document 6209 (a rule for business accounts).

What to do next

Confirm a TC 295 or 305 appears in the account history the client supplies before treating the TC 294 amount as final — the code cannot legitimately post without one.

Read the interest computation date on the TC 294 line, not the posting date, when explaining to a client how much interest has already accrued on the amount being taken back.

Check whether the disallowance came from routine processing (TC 294) or an actual examination (TC 304) before advising on appeal rights; note that IRC 6213(b)(3) lets the IRS assess an excessive tentative carryback refund on either track without the abatement-request procedure of IRC 6213(b)(2).

Run the full account history the client supplies through the IRS Transcript Decoder rather than reading TC 294 in isolation — the size of the original TC 295/305 allowance is what tells you whether this disallowance is partial or total.