For taxes and other items, see this answer I posted earlier today.
https://ttlc.intuit.com/community/tax-credits-deductions/discussion/re-i-sold-my-home-in-sc-in-june-...
Selling expenses that are allowable adjustments to your capital gains are listed in publication 523.
https://www.irs.gov/pub/irs-pdf/p523.pdf
In general, nothing is a separate tax deduction on sale of a personal home, it would only reduce your capital gains. And since you are under the $250K exclusion no matter what, it really is a moot point.
However in general, changes to the house are not allowable expenses. Repairs are things you need to do to keep up your own property, and if you have to make repairs to sell the home, that is not an adjustment to the capital gains. Other selling expenses like photographer, advertising, listing fees, are allowable adjustments. Even staging is an allowable adjustment, provided you don't make changes to the home (the stager brings in furniture etc. then removes it).
Improvements are adjustments to cost basis. Improvements are items that increase the home's value and that are permanently attached to the real property (the land or the buildings attached to the land). Repairs, on the other hand, keep the home in as-is condition and don't materially increase its value although they may make ti easier to sell. For example, painting is a repair and is not an adjustment to the basis, but changing a built-in light fixture or plumbing fixture would generally be an improvement.
