When your baby is a little older, you can start adding pumping to your daily routine. While it's not necessary, it's comforting to have a little bit of a stash of milk built up before you return to work. Warning - be sure to read this page on smart use of your freezer stash!
You must file a tax return if your net earnings from self-employment were $400 or more. So consider this: you may be 36 years old, single and make less than $10,000 per year in regular employment income, but if you have a side business that nets you more than $400, you will need to file a federal tax return.
There is no minimum age for a U.S. sponsor (petitioner) to file a petition for a spouse. However, you must be at least 18 years of age and have a residence (domicile) in the U.S. before you can sign the Affidavit of Support (Form I-864 or I-864EZ).