Do I need to provide tax return documents when applying for a visa in Vietnam, especially if my income is not taxable?

The original poster inquired about the need for tax return documents when applying for a visa in Vietnam, particularly since their income is not taxable in their country. Comments indicate that while tax documents are typically only needed for freelancer, workcation, or remote worker visas, individuals without tax residency may still face challenges. If requested by authorities, providing an explanation letter may be a possible approach.