Deductions & credits

What if the new construction is in a different state?  Our new home is being constructed in TN, we live in MD.  We itemize, have not hit the $10k in MD.   TN as a 9.75% sales tax and I have over $7k in sales tax for items I paid for outside of the construction contract (over budget) and have receipts showing the taxed amount.  May I deduct those?  (Can the $10k be 'split', and will it affect my MD tax return).  Certificate of Occupancy was issued 12/20/19.