The allowed points go in the same box as the mortgage interest. A refinance generally requires you to spread the points out over the life of the mortgage. Home improvement will allow more to be deductible now. Be sure to document what portion you are taking and how you arrived at the number.
You can add the allowed portion to the mortgage interest paid.
IRS Topic No. 504 Home Mortgage Points | Internal Revenue: In cases where you used a portion of your refinance proceeds to improve your home. In that case, the points related to the home-improvement portion of the loan can be deducted in the year you paid them.
About Schedule A (Form 1040 or 1040-SR), Itemized Deductions