DAT 4th time
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Yes, you have to wait a year. Below is what is stated in the 2018 ADA DAT Guide, page 14
Applicants are required to submit a new application and fee for each retest. Applicants must wait at least 90 days from their last attempt, before retaking the DAT; there are no exceptions to the 90-day waiting period.
Applicants who have had three or more DAT attempts must apply for permission to test again. From that point forward, they may retest only once per 12-month period
