If the partnership does business in California then your Schedule K-1 should have included a Schedule K-1 for California. This form will show the California amounts.
If the partnership does not do business in California but you are a resident of California, then the entire amount of your Schedule K-1 income will be taxable by California.
If you are a part-year resident of a state, you are permitted to allocate your income. If you cannot specifically identify how much of your K-1 income relates to California, then you may allocate the income by months, or even days. For instance, if you lived 5 months in California and 7 months in Texas, then 5/12 or .42% of your income would be allocated to California and the remainder is Texas income.
