The Honolulu main post office at 3600 Aolele St. near the airport will be the only post office in Hawaii offering late collection of mail Monday to accommodate last-minute tax filers.

All post offices in Hawaii will be closing at their regular times on tax day. The Honolulu main post office will be the last to close — at 8 p.m. — and is the best bet for last-second Oahu customers who need to purchase stamps or special services.

The blue USPS mail collection boxes and in-wall mail slot at the main post office will be labeled with bright orange signs indicating Tax Mail Drop — Final Pick-Up Midnight. Tax forms with correct postage deposited in those specially designated boxes and slots by midnight will receive April 15 postmarks.

Blue USPS mail collection boxes and mail slots at all other post offices will be collected only at their regular posted times on Monday.