topic 1065 SEP partner (K-1 - box 13). Should this be calculated based on 14A or 14C? My 1065 apparently uses 14C but 1040 uses 14A, so which is correct? in Retirement tax questions

1065 SEP partner (K-1 - box 13). Should this be calculated based on 14A or 14C? My 1065 apparently uses 14C but 1040 uses 14A, so which is correct?

pmeert — Sun, 22 Feb 2026 23:39:54 GMT

2025 taxes

I have a problem with1065 SEP contribution (K-1) for passthrough LLC partnership.

Should this be calculated based on 14A or 14C?

I used TT business to create the K-1's and it has a number that when I enter it in the K-1 section in TT-personal for 1040 it says it is too high and seems to calculate from 14A.

My 1065 apparently used K1- 14C but 1040 seems to use the lower 14A, so which is it?

It there a bug in TT business when calculating the maximum allowed SEP contribution?

Re: 1065 SEP partner (K-1 - box 13). Should this be calculated based on 14A or 14C? My 1065 appar...

DavidD66 — Mon, 23 Feb 2026 04:13:00 GMT

SEP contributions should be calculated using Net Earnings from Self-Employment, which is box 14-A of Schedule K-1 (1065). Box 14-C is Gross Nonfarm Income, which to the best of my knowledge is only used calculate the optional nonfarm method of calculating self-employment tax. The Business program should be using the amount in Box 14-A. Have you reviewed the SEP/IRA Worksheets in Forms view? Right click on Box 1a. In the pop-up window, click on "Data Source". This shows that the source for "Net earnings in self-employment.." comes from Box 14, Code A, not Code C. The calculation in both programs should be the same.

Re: 1065 SEP partner (K-1 - box 13). Should this be calculated based on 14A or 14C? My 1065 appar...

user17718025533 — Mon, 23 Feb 2026 16:11:26 GMT

Ok so in the SEP-IRA worksheet

in PART II SEP Contribution

it has the lower expected amount determined from line 7: this has the value i find also in TT 1040

But "Amount carried as deduction to Schedule K" has a different higher amount, no idea where that came from

The amount in 1a is the same as K-1 box 14A

Data source in the 2 final values is grey so I can't trace it back

I can checkbox the lower amount to carry to the K-1, when I remove the checkbox, the bottom field remains empty.

I guess I will have to delete the form and recalc, but I already filed my 1065 :(

Re: 1065 SEP partner (K-1 - box 13). Should this be calculated based on 14A or 14C? My 1065 appar...

DavidD66 — Wed, 25 Feb 2026 04:58:44 GMT

Can you clarify, please? Do you have an additional question?