Folks, the info on AA's site might say there's a penalty to redeposit but I'd say call. YMMV.

DATAPOINT - I booked an award travel from California to New York in April 2019 for travel in July 2019. Ended up cancelling and had up to a year to reuse miles. As you may know, I can only rebook for same departure and arrival destinations. I really had no plans to go to NY anytime again last year but did not want to pay the $150 to redeposit the 25K miles. At least not yet. I called AA 3 weeks ago. Was told I had to use miles for a trip before the end of April 2020. I thought it was one year from date of travel booked but rep said it's one year from date of purchase. I got him to grant a waiver and I booked for a random trip to NY in late June.

Well a lot has changed in 3 weeks. I went online today 3/27/20, cancelled the NY trip for June 2020 and called AA to redeposit miles. Rep said it would cost $150. I ask for a waiver because of the situation in NY. She went to talk to a supervisor, came back about 2 or 3 mins later and said waiver approved. No $150 redeposit fee. Miles will be redeposited into my account and the $11.20 tax will be returned to my credit card.