Here is a case showing why it is important, even in a default to properly present evidence and offer testimony supporting the relief you are requesting.
In Schindler v. Schindler, No. 13-16-00483-CV, 2018 WL 3151857 (Tex. App.—Corpus Christi 2018, no pet. h.) (mem. op.) (06-28-18), the wife filed for divorce and served Husband, but he did not respond. Wife obtained a default divorce decree. Husband filed a motion for new trial which the trial court denied. Husband appealed, complaining among other things that the evidence did not support the final decree awarding Wife spousal support.
The appellate Court agreed noting that the Wife offered no testimony as to her expenses and needs that her current income could not meet. She provided no explanation of what type of skills she needed in order to become more gainfully employed, nor did she provide testimony regarding an estimate of how long it would take to acquire new skills. She merely testified that she needed some time to develop additional skills and increase her income. This was not enough and the case was sent back to the trial court.