Lost IRA basis

I am preparing my taxes for the first time this year and have found that my CPA never completed form 8606. I have too much income to directly contribute to a Roth IRA, so I contribute to a traditional IRA and convert to Roth. I have never taken a tax deduction for the traditional IRA contribution. I started doing this in the early 2010's when that backdoor option became available. I have never made any withdrawals or over-contributed, maxxing out my contribution every year. Don't I need to fix this so I won't be double taxed on my wthdrawals when I retire? If so, how do I fix this in my current year on my TT forms? I'm kinda confused by the whole issue.