WASHINGTON — President Trump spent much of last spring accusing Amazon of pulling a “scam” on the American taxpayer and ripping off the United States Postal Service. On Tuesday, his administration delivered its own verdict: Not so much.

The task force created by Mr. Trump to investigate the Postal Service’s finances did conclude that the mail system is losing money. But a report issued on Tuesday said that commercial package delivery for Amazon and other e-commerce retailers was actually profitable for the Postal Service and was not costing the United States “massive amounts of money,” as Mr. Trump has suggested in his tweets.

Commercial package delivery is not profitable enough to offset the revenue losses the Postal Service is suffering, however, as Americans mail fewer and fewer first-class letters, and the Treasury Department task force outlined several recommendations to help shore up its finances.

None of the suggestions explicitly recommend the type of price increases that Mr. Trump floated last spring, when he posted a tweet accusing Amazon of using the Postal Service “as their Delivery Boy.” And last December he tweeted that Amazon was getting “richer” while making the postal system “dumber.”