You can only exclude US days of presence once on an F-1 visa. As you already had 5 years or part years on an F1 visa, you are considered a US resident in 2019, assuming you were in the US for most of 2019.
As a US resident, you must claim your worldwide income for calendar year 2019. If you had no earned income or passive income, or if you filed married filing separately, you had less than $5 of income, you do not need to file a US tax return, only Form 8843,
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