What PTE score do you need for the University of Arkansas?

The proficiency page says English tests must have been taken within the two years immediately before the requested semester of admission. It does not mention PTE Academic Online or PTE Core, and it gives institution codes for TOEFL and IELTS but not for PTE. It also says a degree from a country where English is an official language of instruction, such as India, Pakistan, the Philippines or Nigeria, does not by itself exempt you.

For comparison, the same page asks IELTS Academic 6.5 against PTE 58, and IELTS speaking 7.0 and writing 6.0 for teaching assistants against PTE 71 in both.

For undergraduates the page lists PTE writing 71 to 74 as Level II (one ELAC writing course) and 0 to 68 as Level III (a different ELAC course); it does not place scores of 69 to 70 or 75 to 76. For graduate students, writing 60 to 70 is Level II and 59 or less is Level III, which means two ELAC courses in sequence but still admissible.

Requirements vary by programme and change between admissions cycles. The score that binds you is the one on your Arkansas programme page and in your offer letter, so check it there before you book a test.