Does TSMC have a factory in Hefei?

No.

As of 2022, TSMC, Samsung, and Intel all have factories in mainland China and Hefei, plus local fabs such as Wuhan Yangtze Memory, Hefei’s Changxin Memory and Jinghe Integration. TSMC is the world's first company to provide professional integrated circuit manufacturing services and is the world's largest foundry company.

The TSMC Wafer Manufacturing Service Alliance is initiated by the Shanghai Integrated Circuit Technology and Industry Promotion Center ("ICC") and unites eight regions including Hefei, Nanjing, Chengdu, Wuhan, Hangzhou, Jinan, Wuxi, and Suzhou The integrated circuit industry base was established with the strong support of TSMC.