Gaza's Ministry of Economy and Hamas denied imposing commercial taxes, asserting that 10,000-shekel payments were voluntary donations to a national fund supporting needy residents.

From the articleIsrael says commercial goods not entering Gaza over Hamas tax disputeAlso in Israel says entry of commercial goods into Gaza halted amid dispute between traders and Hamas | The National, Israel cites Gazan merchants angered by Hamas taxes as commercial goods stop entering Strip, BoP's Mladenov: Suspension of private sector goods into Gaza is 'unacceptable', Israel halts commercial goods from entering Gaza; Hamas denies tax claims, Israel says commercial goods no longer entering Gaza after merchants suspend coordination | Reuters