line 14 is for basis in traditional IRA's. since you convert each year to ROTHs you have no traditional IRAs and thus $0 basis.
line 14 is a calculated number so you should not be entering anything on that line. overrides will prevent e-filing
let's say you have no basis in traditional IRAs and in 2020 make a nondeductible $7000 IRA contribution which you convert to a ROTH in the same year
form 8606 would look like the following
1) 7000
2) 0
3) 7000
4) 0
5)7000
6) 0
7) 0
😎 7000
9)7000
10) 1.000
11) 7000
12) 0
13)7000
14) 0
