Is the initial $5k qualified? Just because you contributed to a traditional IRA doesn't automatically make it qualified. You can figure out if you do qualify for a deduction based on your income and the tables provided on the IRS website.
If it was nondeductible, then the $1k you converted to Roth in 2021 doesn't get entered on 2a, you would enter "0". You'll need to make the same determination in your 2022 return for the other $4k you converted.
