You do need to enter the full amount of the retirement contribution in box 13 and use the code "R". After you do that in TurboTax, you will have an opportunity to code the contribution as "Payments to 401K (non-Roth plan) and "Employer matching contribution to 401K."
Then, the total contributed will show up on schedule 1 of your form 1040 as it should.
I believe @DavidD66 was referring to a situation where you have self-employment income in addition to partnership or corporate income with a 401-K plan and want to make a SEP or solo 401-K contribution, in which case you would enter the contribution on the personal tax return.
Also, you need to make sure you did not deduct the pension contribution on your partnership return, since that would double up the deduction.
You can enter pension contributions on your partnership return, but only if they are for employees that are not owners.
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