Investors & landlords

Where can I find what expenses incurred for sale would be allowable to add to cost basis (IRS publication)?  Since I cannot deduct rental maintenance expenses on Schedule E for 2019, can the expenses I had for maintaining the home in 2019 (utilities, landscaping, (mowing), property taxes, etc. be added to cost basis?  How about repairs and improvements made to put house on the market?  Many thanks!