@AZjoe , see Schedule SE where you'll find that self-employment tax is calculated solely from net profit from self employment and is not affected by any deductions reported on Form 1040 or Schedule 1 Part II. The amount determined to be your self-employment tax carries over to Schedule 2 line 4 and the total from Schedule 2 line 21 is added on Form 1040 line 23, becoming part of your overall tax liability. TurboTax does all of this properly.
