[Tax year 2020] Taxable IRA RMD

How do I override the taxable amount of my IRA RMD distribution without creating an error?  I reside in Spain and the tax treaty between Spain and the US states that my IRA distribution is taxable in Spain only.  I found that I could override the taxable amount on line 10 of the 1099R summary but that causes an error.   It appears that the tax calculation is correct but I still have that error. I am using TT 2020 Premier.