Can anyone recommend an online tax advisor?

[IbogaProject]

5. I am going to list some of the details

it might be a good year to hire a CPA. They may or may not be busy right now, as the extension deadline to file is October 15.

First you only pay tax on the Gain,
The original cost, plus closing costs are your 'cost basis'.
any major improvements or serious repairs, like new windows, replacing a roof. Smaller jobs like painting or light remodeling don't count.
then from the selling price you deduct any sales commissions, taxes and fees from the sale.
then your gross taxable profit is reduced by $250K if your single. finally there is a slightly graduated scheme in schedule D where the capital gain is taxed.
Estimated is due quarterly, but you only have to prepay 100% of last years liability each quarter, Or 90% of current estimate, which ever is lower.

https://smartasset.com/investing/capital-gains-tax-calculator

https://finance.zacks.com/calculate-capital-gain-selling-house-3027.html