You can pay estimated IRS tax on IRS
payment portal. You'll have to do a best guess estimate.
You can get transcripts on the IRS website of your W-2's and 1099's but the IRS states they may not be ready until July.
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Wage and Income Transcript - shows data from information returns we receive such as Forms W-2, 1099, 1098 and Form 5498, IRA Contribution Information. Current tax year information may not be complete until July.
- To get your online transcripts, click on Get Transcript Online.
Regarding state extension: https://ttlc.intuit.com/replies/3300227
