Is entering my spouse's information a requirement for the CRA or the Home and Business software? Why does it force me to enter it?

If you are married or in a common-law relationship, CRA requires you to include your spouse's information on your tax return in order to calculate any deductions or credits you may be eligible for.

https://turbotax.community.intuit.ca/replies/2648033

If you are married and trying to fill out an income tax form which would include my wife, do I have to fill out an "Authorization Request" from the cra?

No. That would only be need if you were a professional tax preparer.