I'll assume all the items you mentioned were incurred after you inherited it and were to make it ready for sale.
Realtor commission 5% = $11,250 this is a selling expense
New HVAC = $5,000 - this is added to basis
Repairs, Painting and Power washing = $15,000 this is selling expense
When I enter the values in TurboTax - my net proceeds will be: $193,750 and the FMV is $200,000 - resulting is a capital loss of $6250. Is this correct?
there usually are other selling expenses such as title charges, we can't see the closing statement, so there could be others.
whether the loss is deductible depends on what use it was put to if any, after the inheritance. if used as a personal residence - the loss is not deductible.
if it was left vacant and intended to be sold or it was rental, this would be investment property and the loss would be capital.
