回複：替一對老夫婦問關於兒子移民

現在要求老夫婦的稅單，但他們這5年根本沒交過稅。
-Even if they have not paid the tax, they are still supposed to file the tax return, right? If so, just get teh copy of the tax tran from IRS. If they did not file any tax return, just explain it to the immigration officer and that will be OK.

老夫婦想和兒子團聚，請問這種情況怎麽準備麵試？
-Nothing special. Just prepare the required documents.

申請人一定要有一定的經濟擔保嗎？
-Yes. Their daughter's 經濟擔保 is also fine for their son.