What is the GRE score required for UTD?
The average GRE scores accepted by UTD are -
150 - Verbal
163 - Quantitative
4.5 - Analytical Writing Assessment
However, these are average scores. You should aim to score more than this to increase your chances of admission.
You can refer to average GRE scores accepted by US universities here-
https://www.gyandhan.com/blogs/how-do-different-universities-value-gre-scores
How will we receive our I-20 for the Fall session? are there any changes because of the COVID situation?
The university will send the initial I-20 electronically to your UT Dallas email ID. You can request for a physical I20 for your visa interview. You can either request an express mail service or the normal mail service. The regular mail service, though, takes more time, almost 2-4 weeks.