Why did my standard deductions almost double from last year

[CarolynM]

Because the standard deductions increased under the new tax laws.

The new tax laws eliminated the personal exemption, typically $4,050 per person, but increased the standard deductions

The new standard deductions are $12,000 for Single filers, $18,000 for Head of Household, and $24,000 for Married Filing Jointly Filers.

For more information about the changes to the tax laws, follow this link: Tax Relief the Bipartisan Budget Act of 2018