The estimated payments suggested were from the information on your 2025 return. Keep in mind those are just suggestions. If you know you will not have extenuating circumstances in 2026 you do not need to pay the suggested payments.
If you were happy with your tax withholding before the sale of your home leave your W4 alone. If you still want to increase your withholding you can add an amount to Step 4c. Also if you are married or have more than one job make sure to check the box in step 2c.