"If you only have self-employment income your earned income is the Net Profit on Schedule C line 31 minus 1/2 the SE tax (the amount on Schedule 1 line 15)."
That's how net earnings are determined for income-tax purposes However, for Social Security purposes, net earnings are the amount on Schedule SE line 4c. Generally that would be 92.35% of net profit. 42 USC § 411(a)(11)
The IRS reports to the Social Security Administration the amount on Schedule SE line 4c.
