We sold our home of 18 years but did not make the maximum profit of 500,000 for being married ~ do not have a 1099 S so can I skip the sale of home (gain or loss) section

Yes, you can skip that section. If you are comfortable with meeting the requirements and your gain is less than $500,000 for a married filing joint return, then you can keep the information (settlement statement, etc) in your tax file should you need it at any future point.

Key Eligibility Requirements: IRS Publication 523

1. Ownership: If you owned the home for at least 24 months (2 years) out of the last 5 years leading up to the date of sale (date of the closing), you meet the ownership requirement. For a married couple filing jointly, only one spouse has to meet the ownership requirement.
2. Use: If you owned the home and used it as your residence for at least 24 months of the previous 5 years, you meet the residence requirement. The 24 months of residence can fall anywhere within the 5-year period, and it doesn't have to be a single block of time. All that is required is a total of 24 months (730 days) of residence during the 5-year period. Unlike the ownership requirement, each spouse must meet the residence requirement individually for a married couple filing jointly to get the full exclusion.
3. Look Back Period: If you didn't sell another home during the 2-year period before the date of sale (or, if you did sell another home during this period, but didn't take an exclusion of the gain earned from it), you meet the look-back requirement. You may take the exclusion only once during a 2-year period.
4. Exceptions - May not apply to you and can be reviewed at the link above.