Yes, then you are considered a Swedish tax resident but most likely you have your tax treaty residency outside of Sweden. In that case, you will be tax liable on your employment income on your Swedish workdays only.
If only your Swedish workdays are taxable in Sweden, it may be recommended to apply for a tax adjustment in order to get a more accurate preliminary tax withholding during the income year.
Then you may be considered a Swedish tax resident from an earlier date. Please ensure you have your calendar on www.gadeloitte.com up to date for the entire calendar year, indicating your Swedish and foreign work and non-workdays.
Also, inform your Deloitte Sweden representative that you might become tax liable on Swedish workdays prior to your move to Sweden. Your Deloitte contact will then identify the next steps with you.
Should your family depart from your home country at a later stage, you might still be considered resident and tax treaty resident in your home country and your non-Swedish income may not be taxable until your family moves to Sweden.
Please reach out to your Deloitte contact should this be the case in your situation to ensure correct filing.