Schedule C, line 19, donations to my ROTH IRA

For 2018 taxes (and beyond):

I am an author and receive royalties.

I complete Schedule C.

On part 2, line 19- "Pensions", I wanted to know if it is acceptable (or not) to deposit the max in my ROTH IRA using the proceeds of the royalties and claim a deduction on Schedule C, line 19 for the amount deposited in my ROTH IRA?